铸钢件锚的动态顺序凝固浇冒口设计

Design of Gating and Feeding System for Dynamic Directional Solidification of Steel Casting Anchor

按传统的铸钢件冒口设计工艺方法设计了铸钢件锚的两种生产工艺。传统设计工艺是冒口必须放在铸钢件的热节处,冒口模数必须大于铸件模数,或者冒口直径必须大于铸件热节圆直径,工艺出品率仅为47%和53%。新的设计工艺是冒口离开热节而又靠近热节,四件合用一个浇冒口,提高了冒口温度,形成从铸件远端到冒口颈再到冒口的温度梯度和凝固顺序,以动态顺序凝固提高冒口的补缩能力,工艺出品率提高到74.4%。

Two kinds of casting methods for steel casting-anchor were designed according to traditional feeding system designing method, i.e. the riser must be put on hot-spot of steel casting, and the modulus of riser must be larger than that of casting, or the diameter of riser must be larger than that of steel casting hot-spots. The pattern yields for above two methods were only 47% and 53%. The improved casting method is that the riser deviates from the hot-spot but close to it, and one gating and feeding system serves four steel castings at one time. By this method the riser temperature was raised, thus forming temperature gradient and solidification sequence from casting＇s distant end to the riser＇s neck then to the riser. The feeding ability of riser is increased by dynamic directional solidification, and the pattern yield is raised to about 74%.